Hi I used wilwoods kit and intergrated into factory cable connection under drivers seat pan works great.... 70 cougar,,, you have to use wilwoods kit I tried to do it with factory cables too... no go the kit is about 125.00
I don;t know if this will help you, used the Currie rear disc kit, which has the internal drum brake-Emerg. brakes, used the rear Emerg. cables from Lokar, runs from your fulcrum under the car to each wheel, comes with a number of little clips to hook up to the emerg. lever.
Real nice set up by Lokar - $100 +
Off topic - Letting everyone know I have reported picerjamo as a SPAMmer. All his posts are cut-paste of other member's words without any of his own so they're not immediately flagged as SPAM. Testing the system or fishing for reaction I guess, but in any case they are not of benefit to anyone. Report as you see fit with the button under his name on HIS post.